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For the first time, a team of scientists has used the orientation of light left over from the early universe to detect gravitational lensing from galaxy clusters – the bending of light around these massive objects. Using gravitational lensing data taken by the South Pole Telescope and the Dark Energy Camera, Fermilab scientist Brad Benson and colleagues have demonstrated a new way to “weigh” galaxy clusters and ultimately shed light on dark matter, dark energy and other mysteries of the cosmos.

Fermilab scientists have reached the lowest temperature ever achieved at Fermilab, testing a refrigerator for the SuperCDMS dark matter experiment. The fridge, which operates at close to absolute zero, is now one step closer toward installation at SNOLAB in Canada.

Fermilab scientist Joel Butler has been elected vice chair of its Executive Committee. He will begin as vice chair on Jan. 1, 2020, rotating to chair-elect in 2021 and chair in 2022.

Spack, a software package management tool, was recognized with an R&D 100 Award in November. Developed for high-performance computing applications, Spack is used as an end-to-end development tool within the high-energy physics community. Fermilab is a contributor to Spack, whose initial development was led by Lawrence Livermore National Laboratory.

Grab your cocoa or pumpkin spice — as today we examine what’s naughty and nice.

Scientists on Fermilab’s MicroBooNE experiment have measured neutrino interactions on argon with unprecedented statistics and precision using data on the resultant muons — in particular, the muon’s momentum and angle. The experiment features the first liquid-argon time projection chamber with the resolution and statistics to carry out such a measurement. Researchers will use the result to improve simulations of neutrino interactions. These improvements are important for neutrino experiments in general, including the Short-Baseline Neutrino program experiments and the international Deep Underground Neutrino Experiment, both hosted by Fermilab.

In November, the Chicago Quantum Exchange held a workshop about ethics and societal impacts of artificial intelligence and quantum computing technologies. Participants from a wide variety of academic backgrounds, from physicists to sociologists, discussed the implications of technology on society and vice versa and identified critical steps scientists need to take so technology is developed and implemented ethically and responsibly.

Enormous scientific collaborations are made up of hundreds upon thousands of individuals, each with their own story. Online collections of profiles, such as Faces of DUNE, the Dark Energy Survey’s Scientist of the Week blog and Humans of LIGO, reveal the sometimes-ignored human sides of scientists.

Grassellino will help lead the lab’s exciting portfolio for advancing the key technologies in high-energy physics and help oversee the realization of important accelerator projects.

Mingzhi Shen’s career started in finance. Then he discovered that he enjoyed working with numbers in a different way, and he joined Fermilab as a network analyst.